Não informado. (1937). The Science teacher. American Science Teachers Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. The Science Teacher. Normal, Ill: American Science Teachers Association, 1937.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. The Science Teacher. American Science Teachers Association, 1937.
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